Locality KV (San Angelo Fm.) (Permian to of the United States)

Also known as MacFayden Ranch; Swanson Quarry

Where: Knox County, Texas (33.7° N, 100.0° W: paleocoordinates 2.7° N, 29.2° W)

• coordinate estimated from map

When: San Angelo Formation (Pease River Group), Kungurian to Kungurian (279.3 - 268.8 Ma)

• Middle and Upper San Angelo Formation sensu Olson (1962), corresponding to the upper Duncan Sandstone Member and lower Flowerpot Shale Member of the San Angelo Formation sensu Smith (1974). More recently, the age of the San Angelo Formation was reassessed using multiple methods, which suggest a latest Kungurian to (more likely) early Roadian age. See: Laurin, M., & Hook, R. (2022). The age of North America’s youngest Paleozoic continental vertebrates: a review of data from the Middle Permian Pease River (Texas) and El Reno (Oklahoma) Groups. Bulletin de la Société Géologique de France, 193(10), 1-30. https://doi.org/10.1051/bsgf/2022007 (open access).

• member-level stratigraphic resolution

Environment/lithology: "floodplain"; red, sandy shale and conglomerate

• for details see Olson (1962 p. 118)

Size class: macrofossils

Reposited in the FMNH

Primary reference: E. C. Olson. 1962. Late Permian terrestrial vertebrates, U.S.A. and U.S.S.R. Transactions of the American Philosophical Society, New Series 52(2):1-224 [J. Mueller/J. Dummasch/T. Liebrecht]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 80689: authorized by Johannes Mueller, entered by Jana Dummasch on 05.05.2008, edited by Torsten Liebrecht

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Eureptilia - Captorhinidae
"Rothia multidonta" = Rothianiscus multidonta
"Rothia multidonta" = Rothianiscus multidonta Olson and Beerbower 1953 eureptile
CNHM UR 252
Osteichthyes
 Therapsida - Driveriidae
Driveria ponderosa n. gen. n. sp.
Driveria ponderosa n. gen. n. sp. Olson 1962 therapsid
CNHM UR 247 (type), 248
 Caseasauria - Caseidae
Caseopsis agilis n. sp. Olson 1962 synapsid
CNHM UR 253 (type)
Cotylorhynchus hancocki Olson and Beerbower 1953 synapsid
CNHM UR 249, 250
 Synapsida - Sphenacodontidae
Dimetrodon angelensis n. sp. Olson 1962 synapsid
CNHM UR 362 (type)